Re: [Matplotlib-users] Pylab breaks locales with GTK

[Michael D. <md...@st...>]

This seems to be a bug (or at least inconsistent behavior) in numpy when 
the locale is set (which happens when gtk is imported -- replace 'import 
pylab' with 'import gtk' and you'll see the same behavior).

We actually use a workaround for this in other parts of matplotlib, 
which is:

  for i in a: str(float(i))

By forcing the conversion to a Python float first, you can get around 
the localized number output.

I'll follow up with this on the numpy bug tracker or mailing list, since 
this has been a long-standing niggle of mine as well.

Cheers,
Mike

Lionel Roubeyrie wrote:
> Hi all,
> Trying to write to text files some plotted datas, we have a strange
> behavour on masked arrays after importing pylab, with the dot decimal
> separator replaced by a comma (but not all) : 
> ##############################
> Python 2.5.2 (r252:60911, Oct  5 2008, 19:24:49) 
> [GCC 4.3.2] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>   
>>>> import numpy as np
>>>> a=np.ma.array([1., 1.01, 2.11, 3.61])
>>>> for i in a:str(i)
>>>>         
> ... 
> '1.0'
> '1.01'
> '2.11'
> '3.61'
>   
>>>> import matplotlib
>>>> for i in a:str(i)
>>>>         
> ... 
> '1.0'
> '1.01'
> '2.11'
> '3.61'
>   
>>>> import pylab
>>>> for i in a:str(i)
>>>>         
> ... 
> '1.0'
> '1,01'
> '2,11'
> '3,61'
>   
>>>> np.__version__, matplotlib.__version__
>>>>         
> ('1.2.1', '0.98.3')
> #############################
>
> Any help welcomes!
>
>   

-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA